Using in ceiling surround, shall I upgrade?

for "drop down" I mean the typical surround speakers hanging on ceiling or stick on side walls. Isnt it surround speakers are suppose to provide a surrounding effects only, I thought in-ceiling are able to do that.

Internetmin

Thanks for the detail reply. That was 4 years ago I installed the Atlantic tech, at that time my concept was surround speakers are not too essential to the whole thing, now I doubt that is the drawback of my whole system, don't you think so？ That is why I started this thread to confirm I had done it wrong, and I need to convince myself to put up wall mounts on the ceiling while it took a lot of efforts and spending, not to mention a wall mount speaker drop down in the middle of a open space ceiling.
Do you think Atlantic tech was a rather inferior speakers in terms of my gear? It was kind of rush while purchasing the in-ceiling surround due to I was too busy to deal with the renovation detail of whole house at that period, I didn't check many others before I pulled the trigger.

" However, if you cannot do that, then in ceiling can and do work well but you need to really take care to measure and setup properly." Does the MEASURE mean the speaker distance?

I admit the tonal difference for different brand to my front could be a drawback, but I have no idea how much it is. I guess I will never know unless I experiment with same brand, but do you have experience how that would improve?

You didn't seem to oppose using in-ceiling, which I was thinking to get rid of. It is just a matter of whether the in-ceiling speaker can have angled tweeter that can be point at the main listening position, does the rear speakers also do the same? I also heard that the surround and rear speakers shall not be too directional to the listening position in order not to give the listener sense the speakers ARE THERE kind of feel, thats why a bipole speakers are being developed, isn't that contrary to what you just said?

For OFF AXIS, my perception to this term is all diagonal speakers (except center) will cross at one point which shall be the MAIN listening position, (e.g.F/R TO R/L, S/R to S/L)am I correct? Well, I never thought of that when I built them. Is this crucial?

Internetmin

My front speakers are Thiel CS3.7

If for timbre matching, besides Thiel surround speakers (it doesn't convince me that it will be a big step upgrade based on the look of the built, unless someone can tell me otherwise), is there any particular suggestion for brands of in-ceiling or bipole speakers?

To tell more my comment on the issue, it is like the surround speakers are not as dynamic and powerful enough for some big action scene, even if I turn up the level for surround and rears, it doesn't help much. Hence this post.